Update Dalston to snapshots

There is an issue with Kafka in the M1 release (the app generated
here would blow up because of a mismatch between the client and
server). Snapshots are best for now, until we hit RC1.

initializr-service/src/main/resources/application.yml

@@ -36,10 +36,7 @@ initializr:
           - versionRange: "[1.4.x.BUILD-SNAPSHOT, 1.5.0.RC1)"
             version: Camden.BUILD-SNAPSHOT
             repositories: spring-snapshots,spring-milestones
-          - versionRange: "[1.5.0.RC1, 1.5.x.BUILD-SNAPSHOT)"
-            version: Dalston.M1
-            repositories: spring-milestones
-          - versionRange: "1.5.x.BUILD-SNAPSHOT"
+          - versionRange: "1.5.0.RC1"
             version: Dalston.BUILD-SNAPSHOT
             repositories: spring-snapshots,spring-milestones
       cloud-dataflow-bom:
@@ -821,7 +818,7 @@ initializr:
           description: Messaging microservices with Kafka
           versionRange: 1.3.0.M4
           groupId: org.springframework.cloud
-          artifactId: spring-cloud-starter-stream-kafka
+          artifactId: spring-cloud-stream-binder-kafka
     - name: Cloud AWS
       bom: cloud-bom
       versionRange: 1.2.3.RELEASE